[Feature] Install with CLI

[MilesCranmer]

Right now you install SymbolicRegression.jl using python -c 'import pysr; pysr.install()'. However, this is a bit of spooky action at a distance, because you can't quite be sure which pysr is actually being called. Thus, it would be great if there was a CLI, similar to how testing is done with python -m pysr.test main. For example:

python -m pysr.install

If anybody wants to add this, I'd be more than happy to accept a PR!

[w2ll2am]

Hey, I'm new to this project and community but it looks like a fantastic tool with a huge range of applications! I'm a software engineer with an academic background in Physics and DS/ML. I'm looking to try and make a first contribution to your open source project, and this issue seems like a good contender.

I just wanted to clarify that the issue involves implementing the following:

1. Create a script that runs pysr.install() when python -m pysr.install is run in the console.
2. Create an appropriate test to cover this script.

Please do let me know if I've got the right idea to begin working on the issue!

[MilesCranmer]

Hi @w2ll2am,

Thanks so much for offering to work on this, sounds great! I confirm your suggested steps, although, thinking about it now, perhaps it might be better to have the CLI be python -m pysr install (space rather than dot). You will likely want to add a __main__.py file to the source folder, maybe with a click-based CLI. The CLI options could be the same as the arguments to the pysr.install() command.

Cheers!
Miles

[MilesCranmer]

Fixed from #298